三道關(guān)于非謂語和虛擬語氣的題.英語
1.Why hasn‘t he come?_____on time,we would have to put off the trip.
A.if he doesn't come
B.if he won't come
C.if he shouldn't come
D.if he hadn't come
2.The studens will have more discussions like this in the weeks ______.
A.coming B.to come C.come D.to be coming
3.________ halfway through the exercise,the teacher changed his mind and collected all our papers.
A.When only being
B.When we were only
C.Being only
D.Having been
能不能說下答案并告訴我其他選項錯在哪,或用了什么語法搭配.